Fran, Donny and I went to see the psr2100 today, and although I still feel it lacks any real "key feel"....it DOES seem to have a slight advantage over the 2000.
Is it possible that the new units have a more solid "bottom". They both feel light and spongy, but the 2100 seems to "land" better at the bottom of the downstroke. Maybe there is a better keypad under the key, and the spring action is the same. Maybe the new units are just tighter and they will loosen up with time. Maybe I am imagining the whole thing, and they are exactly the same. Who knows?

Anyone notice a significant change in feel after playing one for a while?